Attachment for platen printing-presses



v C. R. BROWN.

ATTACHMENT FOR PLATEN PRINTING PRESSES- 7 APPLICATION FILED JUNE 5. I919.

1,376,187, Patented Apr. 26, 1921.

2 SHEETS-SHEET I LEL M HE fllzjsa BF HIS HTTORNE) c. R. BROWN.

ATTACHMENT FOR PLATEN PRINTING PRE'SSES. v

APPLICATION man JUNE 5. 1919.

1,376,187, Patented Apr. 26, 1921.

l v v '2 SHEETS-SHEET Z- M LE CHARLES R. BROWN, or n'innneeorlrs, IIIINNESQTA, nssrenor. or ONE-HALF 'ro VJ'XLLARD s'rownnn, or sr. PAUL, MINNESOTA.

ATTACI-HVI'ENT FOE ELIE-.TEII PRINTING-PRESSES.

Specification of Letters Patent. Patgnl gd App 25 1921 Application filed June 5, 1919. Serial No. 301,940.

To all w/romit may concern:

Be it known that l, Oneness lt. Bnown, a citizen of the United States, residing at No. 1820 ith street southeast, Minneapolis, Hennepin count y, Minnesota, have invented a new and useful Attachment for Platen Printing-Presses, of which the following is a specification.

lily invention relates to improvements in perforating, cutting and scoring devices cpcrated with platen printing presse. in which the perforating, cutting or scoring blade and ejector are held in position to function with the operating of the press, without injury to the inking rolls, by being fastened to metal clamps which are attached to the grippers of the press, being held in proper position by the tension of sale metal clamps after the grippers are set at their correct positions, and a metal base locked in the form in the chase of the press.

My objects are first to provide a perforating, cutting and scoring attachment which will successfully operate simultaneously with the printing operation without injury to the inking rolls; second to so construct the attachment that it may be applied and adjusted to produce a perforated, cut or scored llIle between any two printed lines as close together as one sixth of an inch if de sired; third to so construct the attachment that by attaching it to the grippers in the manner stated it will act as an auxiliary gripper and ejector with the operation of the press; fourth to so construct it thatit may be attached to any platen printing press easily, quickly and substantially, but without the use of special tools or appliances; fifth, to so construct the device that it will be possible to perforate, cut or score any length of line from one inch up to and in cluding a line of the total length of the active edge of the blade.

I accomplish these by the mechanism illustrated in the accompanying drawings; Figure 1 is a broad side view of the perforating blade. Fig. 2 is a View of the backs of the perforating blade and the ejector fastened to metal clamps, attached to the grippers. Fig. 3 is a broad side view of the perforating blade and ejector with fastening-5 to the cross section of the metal clamps and cross section of the grippers. Fig. 4; is a partial broad side View of the metal base, the perforating blade and the ejector with confurnished nections to the cross section of one metal clamp and cross section of one gripper. liig. 5 1s a sectional end view of the perforating blade and ejector with their fastenings to one metal clamp in position on gripper. Fig. 6 is across section View of a portion of a platen printing press partially open, showing an end View, of my attachment on the grippers in its relative po sition to the metalb ase locked in the form in the chase secured to the bed of the press, and the relative positions of the platen and the bed of the press. Fig. 7 is across section View of the same portions of a platen printing press and my attachment, with the press in a closed position.

Similar numerals refer to Similar parts The three blades and their connections are alike exce 3b as net noted and for brevit a v I will deal herein with the perforating blade (1) shown. In one end of the blade (1) l use a slotted hole with a round hole in the opposite end, which is as I prefer to make them, but either type of holes may be in both ends. The blade (1) may be any length desired for the press with which it is to he need, and is fastened to the upper half of the metal clamps (3) by cotter pins engaging the holes shown in Fig. 1. The ejector (2) is fastened to the lower half of the metal clamps by means of rivets. Uther suitable fastenings may be employed for both. the blade (1) and the ejector if desired. It is essential that the perforating blade (1) and ejector shall be fastened to the metal clamps (3) in such a manner and in such positions that they shall operate so closely together that the blade (1) will justclear the ejector (2) and that the correct tension shall be maintained on both to prevent buckling and to insure a proper functioningof each, thus securing an exact perforation of the paper made between the back otthe I grippers (5) that theclamps may be slipped on over the endsot the grippers to an'enact position thereon to enable a proper tension to be kept on the clamps (3),

the oertoratinp' blade 1 and the e ector l o 3 l (2), and to insure proper contact being blade (1) and the metal base which is looked in the form in the chase (9) with the type (11) and the furniture the chase (9) is secured to the bed (7) of the press in the usual way. The proper location of theclamps on the grippers (5), with the other parts mentioned in positions as stated is essential to insure a correct and exact perforation, cutting or scoring of a line between any two printed lines as close together as one sixth of an inch.

The perforating blade (1 preferably shall be one quarter of an inch greater in length at each end than the ejector but if desired this distance may be increased.

By using a heavy tympan sheet (8) and perforating a suitable metal base t) of type metal or other similar substance, the perforation, cutting or scoring of paper or other similar substances used in the printing art up to a thickness of about equa-lto three plybristol b ard is accomplished.

I amaware that prior to my invention other'perforating, cutting and scoring clevices have been made, but none that I know of that nay be operated with platen printl resses simultaneously with the printing o eration, without injury to the inking rolls to accomplish the pertoratiomthe cutting or scoring of a line to that degree of closess to the printed lines, nor as an auxiliary ipper with an ejector, and I therefore claim: 7 a

A. combination oi two n etal clamps with a metal ejector bar attached at each end of the lower side of said clamps at the inner'ends thereof, together with a metal perforating, cutting or scoring blade attached at each end to the upper side of said clamps also the inner e ds t 18166035, and all in combination with a suitablemetal base, allsub stantially as described.

C. R. 'BROXVN. 

